The Australian athlete who sparked outrage when winning a Hyrox event in Beijing despite soiling herself during the race has returned in style with victory in the first event of the new season in Hamburg.

Joanna Wietrzyk won the endurance sports event in China last month but forfeited the points and soon faced a stinging public backlash as footage of her continuing through demanding exercises and using communal equipment with faecal matter running down her legs went viral on social media.

The 24-year-old posted a statement on social media with an apology in the aftermath of the incident before stepping away from the public eye.…